e-Key v3 - Oncinotis
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Apocynaceae - Apocynoideae - Apocyneae - Oncinotis Benth.

Description :

  • Scandent shrubs to tall, woody climbers
  • Leaves opposite, shortly petioled or subsessile, obovate, oblong-elliptic or elliptic, often abruptly acuminate; axillary glands 0; stipules 0
  • Inflorescence terminal or axillary, consisting of a panicle of few-many-flowered, contracted cymes
  • Flowers relatively small, inconspicuous, often greenish
  • Calyx small, divided almost to base, eglandular within or rarely with 5 minute glands; sepals 5, imbricate, oblong-lanceolate to ovate-oblong
  • Corolla salver-shaped; tube short, widest in middle, hairy without and within, with 5 ligulate scales in mouth, alternating with lobes; lobes spreading or reflexed, ± as long as tube, linear to linear-oblong, overlapping to the right
  • Stamens 5, inserted above base of corolla tube; anthers 4-locular, sessile, conniving in a cone, sublinear, apiculate, shortly sagittate with foot of connective produced into a linear appendage which lies in a channel in the anther, with a cushion of hairs at base, polliniferous in upper part only
  • Disc cupular, 5-lobed or 5-partite
  • Ovary of 2 free carpels, shortly exserted and free from disc; style very short; stigma shortly spindle-shaped with 2-lobed apiculus
  • Mericarps 2, follicular, cylindric and slender to spindle-shaped
  • Seeds lanceolate, linear or oblong with apical tuft of hairs
  • x = 11 (1 report)

Nomenclature:

  • Oncinotis Benth.
    • Bentham: 451 (1849)
    • Stapf: 512 (1907)
    • Codd: 288 (1963)
    • Kupicha: 492 (1985)

Distribution & Notes:

  • Global : Species 7, Africa and Madagascar
  • Southern Africa : Species 1: Oncinotis tenuiloba Stapf (= O. inandensis J.M.Wood & M.S.Evans), KwaZulu-Natal and Eastern Cape border

References:

  • BENTHAM, G. 1849. Oncinotus . In W.J. Hooker, Niger Flora . H. Baillière, London
  • CODD, L.E. 1963. Apocynaceae . Flora of southern Africa 26
  • KUPICHA, F.K. 1985. Apocynaceae : Acokanthera , Pachypodium , Ancylobotrys , Carissa , Landolphia and Oncinotis . Flora zambesiaca 7,2
  • STAPF, O. 1907. Apocynaceae . Flora capensis 4,1